Unhealthy lifestyles, stress, working field, eating habits, trait by both parents, mother's stress or condition during pregnancy period, and other environmental condition during the early life of the child. These factors creates a form methylation marks that attach to our genes and it does not damage our genes but alters our genes expression. The genes that are impacted are the genes that regulate our brain development. Which is about 85% of our genes. And they are the most sensitive genes. Our brain is the only organ that has not fully formed during birth and it is designed to be shaped to our environment. It is an advantage so we can adapt to whatever environment we grow up in. However, if the environment isn't ideal, if we don't move, not interacting,  involved in stress, if we have problem somewhere that effects our brain. Other factors such as pollution, chemical (BHA, plastic and etc), lifestyles are the main problem that driving the change in our brain. (Dr.Melillo, Mother's Guide Through Autism, 2021). So, when a mother and father get together and if they have this methylation in their genes. In the old days, we believe it will not affect the baby and the baby will comes with white clean or all clean genes. However, that's not true, many of the methylation can be traced up to 11 generations. However, it is reversable will the proper brain stimulation, specific exercises and with nutrition diet plan.